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Texas Instruments SN74ABT2244ADW
- Part No.:
- SN74ABT2244ADW
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT2244ADW.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:302
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Product details
Overview
SN74ABT2244ADW from Texas Instruments is an octal noninverting buffer/line driver with 3-state outputs, designed for memory address and bus-oriented applications. It operates from 4.5 V to 5.5 V, supports –40°C to 85°C industrial temperature range, features 25-Ω integrated series output resistors, and delivers 12 mA sink capability per output - enabling clean signal integrity in high-speed digital buses.
For engineers reviewing the SN74ABT2244ADW datasheet, SN74ABT2244ADW pinout, SN74ABT2244ADW application, or SN74ABT2244ADW equivalent, key selection criteria include its 20-pin SOIC (DW) package, dual 4-bit 3-state output groups controlled by independent OE inputs, low ground bounce (<1 V), and latch-up immunity exceeding 500 mA per JEDEC JESD-17.
Technical Context
This device implements two independent 4-bit noninverting buffer sections, each with dedicated active-low output-enable (OE) control. Each output incorporates on-die 25-Ω series resistance to suppress overshoot/undershoot without external termination.
It uses Texas Instruments' EPIC-IIB BiCMOS process for low power dissipation and high noise immunity. The device enters high-impedance state during power-up/down when VCC is between 0 and 2.1 V, and requires pull-up on OE above 2.1 V to guarantee 3-state behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - compatible with standard 5-V TTL and CMOS logic systems |
| IOL (per output) | 12 mA - sufficient drive strength for fan-out to multiple TTL loads or short PCB traces |
| tPLH/tPHL | 1 ns to 4.7 ns (typ) - enables reliable operation in >100 MHz bus timing margins |
| Output Series R | 25 Ω (integrated) - eliminates need for external series termination resistors on PCB |
| ESD Rating | >2000 V HBM - robust handling in automated assembly and field environments |
| Latch-up Immunity | >500 mA per JEDEC JESD-17 - ensures survivability under transient fault conditions |
| VOHP / VOLP | <1 V (typ at VCC = 5 V) - minimizes ground bounce in dense multi-driver layouts |
Pinout & Package
SN74ABT2244ADW is housed in a 20-pin SOIC (DW) package, 7.5 mm × 12.8 mm body size, 1.27 mm lead pitch, 2.65 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of Group 1 (pins 1Y1–1Y4) and Group 2 (pins 2Y1–2Y4); asserted low enables outputs |
| 1A1–1A4, 2A1–2A4 | Input data lines | Eight noninverting inputs - grouped as two sets of four; no internal inversion |
| 1Y1–1Y4, 2Y1–2Y4 | 3-state buffered outputs | Each includes 25-Ω series resistor; high-impedance when corresponding OE is high |
| GND (Pin 10), VCC (Pin 11) | Power supply terminals | Single 5-V supply; decoupling required near Pin 11 due to fast switching currents |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω output series resistance | Eliminates external termination components and reduces PCB layout complexity for impedance-matched buses |
| High-impedance during power sequencing | Prevents bus contention at power-up/down when VCC is 0–2.1 V - critical for hot-swap and reset-safe designs |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS low static power - achieves 30 mA max ICC at full drive while minimizing heat |
| 2000-V HBM ESD protection | Enables direct handling in manufacturing without special ESD controls beyond standard Class 1A protocols |
| Symmetrical OE inputs with TTL-compatible thresholds | VIH = 2 V, VIL = 0.8 V - interoperable with legacy 5-V microcontrollers, FPGAs, and ASICs without level shifting |
Applications
| Memory Address Buffering | PCI/ISA Bus Transceiver Interface |
|---|---|
|
Use Scenario: Driving 20-bit address bus from microcontroller to SRAM or Flash memory in industrial control module. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing isolation and fan-out gain between CPU and memory subsystem. Use Value: Integrated 25-Ω series resistors suppress reflections on parallel address traces, reducing setup/hold timing violations at 25 MHz clock rates. |
Use Scenario: Interfacing FPGA I/O banks to legacy PCI or ISA peripheral slots in test equipment backplane. IC Role / Device Role / Timing Role: Bidirectional bus driver with independent OE control for multiplexed address/data lines. Use Value: Dual 4-bit groups allow simultaneous control of upper/lower byte lanes; high-impedance during reset prevents bus contention. |
| Programmable Logic I/O Expansion | Digital Signal Processor (DSP) Memory Interface |
|
Use Scenario: Expanding GPIO count of CPLD by buffering control signals to LED arrays, relays, and sensors. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer for driving discrete loads from low-drive PLD outputs. Use Value: 12 mA sink per output directly drives LEDs or small-signal MOSFET gates without external transistors. |
Use Scenario: Isolating DSP EMIF address/data lines from external SDRAM or asynchronous peripherals in telecom baseband board. IC Role / Device Role / Timing Role: High-speed noninverting buffer with controlled edge rates to meet SDRAM tDS and tDH requirements. Use Value: Typical propagation delay of 4.3 ns (tPHL) and <1 V ground bounce ensure stable strobe-to-data timing under heavy load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT2244ANSR | Same logic function and specs, but in SOP-20 (NS) package - 10.5 mm × 10.2 mm, 1.75 mm height | Higher board density; better thermal performance than SOIC but requires different land pattern and stencil design | Select when space-constrained layout favors smaller footprint and higher thermal conductivity via exposed pad variants |
| SN74LVC244APWR | 3.3-V only (1.65–3.6 V), lower drive (24 mA sink), no integrated series resistors, 1.2-V logic thresholds | Not pin-compatible; requires level translation for 5-V systems; suited for modern low-voltage FPGA interfaces | Choose only for new 3.3-V designs where power efficiency and compatibility with LVTTL/LVCMOS I/O standards are prioritized |
Compared with SN74ABT2244ANSR and SN74LVC244APWR, the SN74ABT2244ADW uniquely combines 5-V operation, integrated 25-Ω termination, and SOIC-20 manufacturability - making it optimal for industrial upgrades of legacy 5-V bus systems without redesigning layout or voltage rails.
Availability
SN74ABT2244ADW is available at Aetrix Electronics and suitable for memory address buffering, PCI/ISA interface expansion, and programmable logic I/O conditioning requiring stable component supply across long-lifecycle industrial programs.
Supply support for SN74ABT2244ADW includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in industrial, automotive, and communications markets.
The SN74ABT2244ADW belongs to TI's ABT logic family - engineered for high-speed 5-V bus interfacing with enhanced noise immunity, low ground bounce, and robust ESD tolerance in harsh operating environments.
FAQ
What is the maximum operating temperature for SN74ABT2244ADW?
The SN74ABT2244ADW is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade rating ensures reliable performance in factory automation controllers, motor drives, and outdoor communication equipment where thermal cycling and extended uptime are critical. The device maintains specified timing and drive strength across this full range without derating.
Does SN74ABT2244ADW require external pull-up resistors on OE pins?
Yes - to guarantee high-impedance output state when VCC exceeds 2.1 V, OE pins must be pulled up to VCC. The minimum pull-up resistor value depends on the current-sinking capability of the driving source; TI recommends ≤10 kΩ for typical microcontroller GPIOs. Without this, outputs may inadvertently enable during power transitions.
Can SN74ABT2244ADW drive standard TTL loads directly?
Yes - SN74ABT2244ADW provides 12 mA sink per output and meets TTL voltage thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V), enabling direct fan-out to up to 10 standard TTL inputs. Its 25-Ω integrated series resistance further improves signal integrity on unterminated stubs common in backplane and motherboard routing.
Is SN74ABT2244ADW pin-compatible with other packages in the same family?
No - while SN74ABT2244ADW (SOIC-20), SN74ABT2244ADBR (SSOP-20), and SN74ABT2244APW (TSSOP-20) share identical logic function and electrical specs, their pinouts are identical but physical footprints differ. Mechanical compatibility requires matching land patterns; SOIC-20 cannot be substituted for SSOP-20 without PCB revision.
What is the thermal resistance (θJA) of SN74ABT2244ADW in its SOIC package?
The junction-to-ambient thermal resistance (θJA) for SN74ABT2244ADW in the DW (SOIC) package is 97°C/W under standard JEDEC test conditions (1-layer 1-in² copper pad). This value assumes proper PCB layout with adequate copper pour and thermal vias; actual system-level θJA will vary based on board stack-up and airflow.
SN74ABT2244ADW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 12mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74ABT2244ADW FAQ
1.How can I place an order for SN74ABT2244ADW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT2244ADW on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74ABT2244ADW reliable?
The price and inventory of SN74ABT2244ADW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT2244ADW is usually 5 days.
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SN74ABT2244ADW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT2244ADW order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74ABT2244ADW?
For technical support, including SN74ABT2244ADW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT2244ADW requirements.
6.How does Aetrix verify that SN74ABT2244ADW is sourced from the original manufacturer or authorized distributors?
All SN74ABT2244ADW products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74ABT2244ADW meets industry standards.
7.What is the process for return or replacement of SN74ABT2244ADW?
All SN74ABT2244ADW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT2244ADW, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74ABT2244ADW part is unused and in its original packaging.
Return procedure for SN74ABT2244ADW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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